From 0f7826d6d04c48f4d1824158e22c52364ee88e18 Mon Sep 17 00:00:00 2001
From: Elian Doran <contact@eliandoran.me>
Date: Fri, 31 Jan 2025 21:44:59 +0200
Subject: [PATCH] feat(print): implement basic export as PDF support

---
 src/public/app/widgets/note_detail.js |  4 +++-
 src/services/window.ts                | 23 +++++++++++++++++++++--
 2 files changed, 24 insertions(+), 3 deletions(-)

diff --git a/src/public/app/widgets/note_detail.js b/src/public/app/widgets/note_detail.js
index ae38b1b93..8b4b5bb66 100644
--- a/src/public/app/widgets/note_detail.js
+++ b/src/public/app/widgets/note_detail.js
@@ -32,6 +32,7 @@ import AttachmentDetailTypeWidget from "./type_widgets/attachment_detail.js";
 import MindMapWidget from "./type_widgets/mind_map.js";
 import { getStylesheetUrl, isSyntaxHighlightEnabled } from "../services/syntax_highlight.js";
 import GeoMapTypeWidget from "./type_widgets/geo_map.js";
+import utils from "../services/utils.js";
 
 const TPL = `
 <div class="note-detail">
@@ -296,7 +297,8 @@ export default class NoteDetailWidget extends NoteContextAwareWidget {
             return;
         }
 
-        alert("Hi");
+        const { ipcRenderer } = utils.dynamicRequire("electron");
+        ipcRenderer.send("export-as-pdf");
     }
 
     hoistedNoteChangedEvent({ ntxId }) {
diff --git a/src/services/window.ts b/src/services/window.ts
index 84c8f5a46..897a6e4da 100644
--- a/src/services/window.ts
+++ b/src/services/window.ts
@@ -1,3 +1,4 @@
+import fs from "fs";
 import path from "path";
 import url from "url";
 import port from "./port.js";
@@ -7,8 +8,8 @@ import sqlInit from "./sql_init.js";
 import cls from "./cls.js";
 import keyboardActionsService from "./keyboard_actions.js";
 import remoteMain from "@electron/remote/main/index.js";
-import type { App, BrowserWindow, BrowserWindowConstructorOptions, WebContents } from "electron";
-import { ipcMain } from "electron";
+import { BrowserWindow, type App, type BrowserWindowConstructorOptions, type WebContents } from "electron";
+import { dialog, ipcMain } from "electron";
 import { isDev, isMac, isWindows } from "./utils.js";
 
 import { fileURLToPath } from "url";
@@ -46,6 +47,24 @@ ipcMain.on("create-extra-window", (event, arg) => {
     createExtraWindow(arg.extraWindowHash);
 });
 
+ipcMain.on("export-as-pdf", async (e) => {
+    const browserWindow = BrowserWindow.fromWebContents(e.sender);
+    if (!browserWindow) {
+        return;
+    }
+
+    const filePath = dialog.showSaveDialogSync(browserWindow, {});
+    if (!filePath) {
+        return;
+    }
+
+    // TODO: Report if there is an error in generating the PDF.
+    const buffer = await browserWindow.webContents.printToPDF({});
+
+    // TODO: Report if there was an error in saving the PDF.
+    fs.writeFileSync(filePath, buffer);
+});
+
 async function createMainWindow(app: App) {
     if ("setUserTasks" in app) {
         app.setUserTasks([